Noiseless wrist watch alarm



May 25, 1954 M. v. MARSHALL NOISELESS WRIST WATCH' ALARM Filed Dec. 5 1951 INVENTOR. Waxy Z/WZfiTS'QZZI m rz w.

ATTD RN EYE Patented May 25, 1954 UNITED STATES PATENT OFFICE NOISELESS WRIST WATCH ALARM Mary V. Marshall, Jackson Heights, N. Y.

Application December 5, 1951, Serial No. 260,035

3 Claims.

This invention relates to alarm watches, and the like, and in particular a wrist watch having an alarm attachment incorporated therein and wherein the alarm attachment actuates a tappin device positioned to strike the skin on the wrist of a person wearing the watch whereby the attention of the person is arrested by a tapping action instead of by the ringing of a bell.

The purpose of this invention is to provide an alarm device that is particularly adapted for persons who are deaf or partly deaf and which, in providing a silent alarm is also adapted for use in the trenches or in a classroom or the like.

Where an alarm deviceof the bell actuated type is incorporated in a wrist watch and the watch is set to call the wearers attention to a certain time the ringing of a bell is embarrassing in a classroom,church, railway coach or other vehicle or in the trenches, and furthermore where a person is deaf or hard of hearing it is desirable to provide an alarm device that operates with a tapping action instead. of ringing a bell. With this thought in mind this invention contemplates an attachment for an alarm watch whereby the ringing action is converted into a tapping movement and with the watch set to a predetermined time the attention of the wearer is arrested noiselessly by a tapping action.

The object of this invention, is therefore, to provide means for incorporating a tapping element on the case of a watch or the alarm type whereby the tapping element is actuated by the alarm or ringing mechanism of the watch.

Another object of the invention is to provide a tapping alarm element that is adapted to be mounted on alarm watches now in use.

A further object of the invention is to provide a tapping attachment for alarm watches which is of a simple and economical construction.

With these and other objects and advantages in view the invention embodies a plunger mounted in the casing of a watch of the alarm type and connected to analarm actuating element in the watch, whereby the plunger is actuated with the tapping or reciprocating action of the alarm operating elements of the Watch.

Other features and advantages of the invention will appear from the following description taken in connection with the drawings wherein:

Figure 1 is a view looking toward the back of a wrist watch with part of the casing broken away showin alarm operating elements in the watch and showing a plunger extended through the watch casing.

Figure 2 is a similar elevational view with the 2 back of the watch removed and illustrating a cam actuated spring by which the plunger extended through the watch casing is operated.

Figure 3 is a cross section through the back or rear portion of the watch casin with the parts shown on an enlarged scale, illustrating the mounting of the reciprocating or tapping plunger, and wherein the watch casing is broken away, said section bein taken on line 3-3 of Figure 2.

Figure I} is a view similar to that shown in Figure 2 wherein a rear section of the watch case is removed and this figure shows a modification wherein a spring wire U-shaped member is used instead of the fiat spring shown in Figures 1, 2 and 3 for actuating the plunger.

Figure 5 is a cross section taken on line 5-5 of Figure 4 ShOWlIlg the modified structure of Figure 4.

Figure 6 is a detail through the actuating cam of the devices shown in Figures 1 and 4 said sections being taken on line 6-5 of Figure 4.

Referring now to the drawings wherein like reference characters denote corresponding parts the tapping wrist watch alarm device of this invention includes a plunger [0, slidably mounted in a hub l I of a back l2 of a watch, and a flat U- shaped spring It also in the back of the watch and positioned whereby a clapper or cam M of an alarm l5 engages the upper surface, as shown in Figure 3 and as the cam moves over the spring the extended end of the spring moves downwardly to the position shown in dot and dash lines whereby the plunger I0 is forced through the back of the casing to engage the skin, as indicated by the numeral l6, of a person wearing the watch.

The extended end of the spring I3 is bifurcated providing a slot l1 and the end of the plunger it is provided with an annular recess in which the sections of the spring at the sides of the slot are positioned.

The cam M is pivotally mounted on a pin l8 and the cam is reciprocated between the positions shown in full and dotted lines in Figure 1 by the alarm mechanism of the watch.

The cam US is provided with an arm 4 that is positioned to be engaged by an escapement wheel 5 of a watch whereby reciprocating action is imparted to the cam.

The back E2 of the watch casing is provided with spacing lugs I 9 which provide an open area between the back of the watch and the surface of a wrist upon which the watch is positioned.

In the design illustrated in Figures 4 and 5 a plunger 20 is positioned to extend through an opening 2| in the back 22 of a Watch casing 23, and a spring 24 mounted in a post 25 on the inner surface of the back 22 of the watch is held with a set screw 26 and on the extended end of the spring the plunger 20 is carried. The plunger is secured on the end of the spring with a set screw 21 and the spring is actuated by a cam 28 pivotally mounted in the watch casing on a pin 29, whereby the spring is positioned so that a sloping surface 30 of the cam engages the extended part of the spring and forces the plunger 20 outwardly to the position shown in dotted lines in Figure 5. turned by the spring.

The plunger is re- In this design the back 22 of thewatchcasing 1. In a tapping alarm for a wrist watch, the

combination which comprises a Wrist watch case havingr a frent and back with Watch works and an escapement wheel thereim said back having an opening therethrough, a plunger slidably mounted-in: the opening of the hack of the Watch casei-ai U -shapedspringinthe ca-"e and positioned with one end attached tothe back of the case andwthe free end operatively connected-to'the plunger, and acam pivotally mounted in the Watchwcase and positioned to: engage 'the free arm of the spring, said cam having an arm extended: for engagement with the escapement wheelofthe watch whereby upon rotation of the escapement wheelthe cam is actuatedto engage the spring with; a reciprocating movement.

2; In a c-tapping alarm for a wristwatch, the combination which; comprises a wrist watch case havinga: front and back with; watch works and an escapement wheel thereinisaid back having an opening therethrough, a plunger slidably mounted-in-the opening of the=back;oi": the watch,

a U,-shapedr:spring. in thewatch and, positioned with one, end. attached to-the-back" of the. watch case andv the freetendwextended for engagement with the plunger, said free end being bifurcated and said plunger having an annular recess in which sections of the spring at the sides of the bifurcated end are positioned, and a cam pivotally mounted in the watch case and positioned to engage the free arm of the spring, said cam having an arm extended for engagement with the escapement wheel of the watch whereby upon rotation of the escapement wheel the cam is actuated to engage theispring with a, reciprocating movement.

3. In a tapping alarm for movement for use in a--.wrist watch having a case with a front and aa-back.:=and"having watch works and an escapement Wheel in said case, said back having a hub w-ith an opening therethrough and the axis of, saidiopeningl being perpendicular to the base of the back, a plunger slidably mounted in the opening: through the hub of the back, said plunger having an annular recess spaced from theend positioned in the watch case, a U-shaped spring irr the watch case and positioned with one end; attachedto the back of the watchand' the free end, which is bifurcatedextended through the annular recessot theplunger, anda cam pivotally' mountedv in-"the watch case and. positioned-to engage the'free end of the spring-,-said cam havinga beveled surface which engages, the end of the spring and alsovhaving,arr-arm'extended; for engagement with the :escapement wheel: of thewatch wherebyupon'rotation' ofthe escapement. wheel the; cam: is, ,actuatedeto: re-y ciprocate the plunger.

References, Citedin .the filecoi thishpatents UNITED STATES: PA-TENTS:

Number Name Date 1,486,608 Schroeder Mar: 11, 1924? 1,562,978 Miller Nova-24, 1925 2,337,482 Lysk'a' Dec: 21, 1943 FOREIGN PATENTS Number" Country Date 1 228,245: Switzerland Now 1, 1943' 

